Meta-stable solidification created by the detonation method of coating formation

• Autorzy: Wołczyński W. , Garzeł G. , Morgiel J. , Senderowski C. , Pawłowski A.
• Języki publikacji: EN

Abstrakty

EN

Particles of the Fe-Al type (less than 50 m in diameter) were sprayed onto the 045 steel substrate by means of the detonation method. The TEM, SAED and EDX analyses revealed that the Fe-Al particles have been partially melted in the experiment of coating formation. Particle undergone melting even within about 80% of its volume. Therefore, solidification of the melted part of particles was expected. Solidification differed significantly due to a large range of chemical composition of applied particles (from 15 at.% Al up to 63 at.% Al). A single particle containing 63 at.% Al was subjected to the detailed analysis, only. The TEM / SAED techniques revealed in the solidified part of particle three sub-layers: an amorphous phase, [...] , periodically situated FeAl + Fe2Al5 phases, and a non-equilibrium phase, [...]. A hypothesis dealing with the inter-metallic phases formation in such a single particle of the nominal composition No = 0.63 is presented. At first, the solid / liquid system is treated as an interconnection: substrate / liquid / nonmelted particle part . Therefore, it is suggested that the solidification occurs simultaneously in two directions: towards a substrate and towards a non-melted part of particle. The solidification mechanism is referred to the Fe-Al meta-stable phase diagram. It is shown that the melted part of particle solidifies rapidly according to the phase diagram of meta-stable equilibrium and at a significant deviation from the thermodynamic equilibrium.

Słowa kluczowe

EN

theory of crystallization; rapid solidification process; Fe-Al coating; meta-stable phase diagram; amorphous phase

PL

krystalizacja; krzepnięcie szybkie; powłoka Fe-Al; faza amorficzna

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2012
• Tom: Vol. 12, iss. 2
• Strony: 93--96
• Opis fizyczny: Bibliogr. 11 poz., rys., wykr.

Twórcy

autor

Wołczyński W.

autor

Garzeł G.

autor

Morgiel J.

autor

Senderowski C.

autor

Pawłowski A.

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, 30-059 Kraków, Poland,

Bibliografia

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